<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <h1>我是a页面</h1>
    <button>点击我跳转到b页面并且传参数到b页面</button>
    <a href="./b.html?num1=10&num2=20">点击我跳转到b页面</a>
    <script>
        var num = 10;
        var btn = document.querySelector("button");
        btn.onclick = function(){
            // 在跳转到b页面的同时 带上 num参数；
            // 跨页面传参；
            window.location.href = "b.html?num="+num;
        }


    </script>
</body>
</html>